How many characters appear in this drama?
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Did the two wrong men take the right paper?
A. Yes
B. No
C. Not mentioned
Why didn’t the professor’s daughter stay with her father?
A. Freda is in hospital.
B. Miss Green isin hospital
C. The professor isin hospital.
How long had the professor read the paper when two wrong men arrived?
A. One hour and a half
B. One hour
C. Half an hour
How didthe professor know that these two people are not the right people?
A. The two men arrived in the professor’s room earlier.
B. The two men claimed that they knew the professor’s invention.
C. The two men did not show their cards to the professor.
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